References
- Altus W. D. Birth order and its sequelae. Science 1966; 151: 44–49
- Beitchman J., Nair R., Clegg M., Patel P. Prevalence of speech and language disorders in 5-year-old kindergarten children in the Ottawa-Carleton Region. Journal of Speech and Hearing Disorders 1986; 51: 98–109
- Beitchman J. H., Peterson M., Clegg M. Speech and language impairment and psychiatric disorder: The relevance of family demographic variables. Child Psychiatry and Human Development 1988; 18: 191–207
- Belmont L., Marolla F. A. Birth order, family size, and intelligence. Science 1973; 182: 1096–1101
- Bishop D. v. M., Edmundson A. Language-impaired 4 year olds: Distinguishing transient from persistent impairment. Journal of Speech and Hearing Disorder 1987; 52: 156–174
- Breland H. M. Birth order, family configuration, and verbal achievement. Child Development 1974; 45: 1011–1019
- Butler N. R., Peckham C., Sheridan M. Speech defects in children aged 7 years: A national study. British Medical Journal 1973; 3: 253–257
- Emery A. E. Methodology in Medical Genetics: An introduction to statistical methods, 2nd edn. Churchill Livingstone, Edinburgh 1986
- Glass D., Neulinoer I., Brim O. Birth order, verbal intelligence, and educational aspiration. Child Development 1974; 45: 807–811
- Haldane I. B. S., Smith C. A. B. A simple exact test for birth order effect. Annals of Eugenics 1947; 14: 117
- Hamilton J. Sixteen years on: A follow-up of the 1947 Scottish survey. University of London Press, London 1969
- Ingram T. T. S. Speech disorders in childhood. Foundations of Language development, E. H. Lenneberg, E. Lenneberg. Academic Press, New York 1975; Vol 2: 195–255
- Jeffery R., Freilinger I. Iowa Severity Rating Scales for Speech and Language Impairments. Iowa Department of Education, Des Moines, IA 1986
- Kohn M. L., Schooler C. Class, occupation and orientation. American Sociological Review 1969; 34: 659–678
- Kolvin I., Fundhdis T., Scanlon E. Early development, type and prevalence. Speech Retarded and Deaf Children: Their Psychological Development, T. Fundudis, I. Kolvin, R. Garside. Academic Press, London 1979
- Leonard L. Phonological deficits in children with developmental language impairment. Brain and Language 1982; 16: 73–86
- Rees A. H., Palmer F. H. Factors related to change in mental test performance. Developmental Psychology Monograph 1970; 3(2), Pt 2
- Schooler C. Birth order effects: Not here, not now. Psychological Bulletin 1972; 78: 161–175
- Tomblin J. B. Familial concentration of developmental language impairment. Journal of Speech and Hearing Disorders 1989; 54: 287–295